A devoted, 290-pound White Castle fan is steaming mad at the fast-food chain, which he says repeatedly broke promises to make the booths in his local eatery bigger.....All stockbroker Martin Kessman wants is a place at the table. But when the 64-year-old walked into the White Castle in Nanuet back in April 2009 for his usual No. 2 combo meal, he got an unpleasant surprise.

“They’re stationary booths,” he told The Post. “I’m not humongous, [but] I’m a big guy. I could not wedge myself in.”....Mortified and in pain from smacking his knee into one of the table’s metal supports, Kessman limped out of the restaurant, and later penned a complaint to corporate headquarters.

“As I looked around the restaurant, I saw that there were no tables and chairs that could accommodate a person that merely wanted to sit down and eat his meal,” Kessman wrote.

Kessman claims he has no problem finding a place to take a load off at other fast-food places, and fits easily into airline seats.

White Castle replied with three “very condescending letters” -- and an offer that added insult to injury.

“In each letter was a coupon for three free hamburgers -- but the cheese was extra!” according to a lawsuit Kessman filed last week in Manhattan federal court.

But somehow, the humiliation didn’t dampen Kessman’s appetite for sliders at a discount.